Driving gear for printing presses



1933- w. ROCKSTROH DRIVING GEAR FOR PRINTING PRESSES.

Filed May 5, 1952 /n vento Patented Aug. 1, 1933 Walter Rockstroh,Dresden, Germany Application May 3,1932, Serial No. 608,961, mm

' in Ge'rmanySeptember 28, 1931 11 Claims. (01.101-250) This inventionrelates to improvements in driving gear for printing presses and hasparticular but not exclusive reference to flat bed machines.

Prior to the present invention it hasbeen customary to mount theelements of the gear for driving fiat bed printing presses individuallyin thesupporting frame of the press, so that a separatemounting withinthe supporting frame was necessary for each of the shafts of the drive.Printing machines have also been constructed in which a part of thedrive is mounted outside the wall of the machine. In neither of thesetypes of machine, however, can the driving mechanism as a whole bedetached from the machine, since each of the, shafts is mountedseparately in the supporting frame and must therefore be detachedseparately from the machine. 1

The present invention has amongst its objects to obviate thisdisadvantage and with this and other ends in view all the parts of thedriving gear serving to impart motion to the component parts of aprinting machine are encased in a separate gear box.

7 The gear box is preferably detachably mounted and may be situatedwithin or without the supporting frame of the press.

In a device according to the present invention the gearbox controls themovements of all 30 the movable parts of the press, whether the rotarymotion for driving the continuously rotating impression cylinder or thatfor driving the one-revolution control shaft which produces the timedmovements. Each of the shafts which '35 serve to impart motion to a partof the press is detachably connected to the corresponding driven member,for example, by a simple coupling or by toothed wheels. The driving gearcan be of any convenient type, there being many known 40 constructionswhich can be inserted in a subthe invention,

, Figure 2 is a sectional plan view of the con struction shown in Figure1.

The supporting frameof the printing press illustrated is constructed intwoparts, a lower part 1 and an upper part 2, the sub-frame 3 beingbolted or'otherwise detachably mounted on the lower part 1. The upperpart 2 which is suitably mounted on the lower part 1 carries thetracksfor the printing carriage 4. In the construction shown, the shafts5 on which the wheels 6 are mounted are employed for imparting motion tothe carriage 4. The shaft 7 makes a uniform rotary movement ,and istherefore used for driving the impression cylinder 8. The, shaft 9rotates rapidly and may be employed for driving, for instance, therapidly rotating feed drums 11 of the feed apparatus which delivers thepaper or other material to be printed to the press. The driving motor 10is so mounted on the gear box 3, that it does not require any specialsupport in the frame of thepress.

A driving gear such as described has many advantages over theconstructions heretofore proposed; for example, the individual mountingof numerous shafts in the frame is obviated; The gear boxes may bemanufactured by mass production and they may be so constructed that onegear box can be used for several sizes of machines, and furthermore theymay be inserted complete in the machine. The driving gear may also belocated in a place within the machine where it neither weakens the framenor makes the machine longer, as for example the known driving device ofstop cylinder machines. The gear requires little attention because itcan run in oil and can be detached from the machine without difl'iculty.

I claim:- 7

l. A printing press, comprising an impression member and a printingmember, means for feeding the material to be printed between them, a nmain frame for said press, a subsidiary .frame detachably mounted on andcarried by said main frame, and driving gear for the presshoused in saidsubsidiary frame.

2. A printing press, comprising an impression member and a printingmember, means for feeding the material to be printed between them,

a main frame for said press, a subsidiary frame removably carried insaid main frame, and driving gear for the press housed in saidsubsidiary frame and removable'therewith.

3. A printing press having the usual cooperating members between whichthe material to be printed is pressed, comprising the combination withthe frame work of the press, of

' acradle detachably mounted therein, and driving mechanism for saidpress supported in said cradleand removable en bloc therewith.

4. A fiat bed printing press, comprising the combination of a frame ofsaid press, a printing carriage reciprocatable thereon, an impression51. a cylinder for co-operating with said carriage, a sub-frameremovably attached to the frame of the press, and driving mechanism forsaid carriage and cylinder carried by said sub-frame and removable as aunit therewith.

5. In a printing press having the usual movable co-operating membersbetween which the printing is egected,'t he,combination 0fa:machine bedon which saidin ern'bersare carriedja sub-frame removably attached tothe bed, and driving gear for the said members and one electricmotorcoupled to said gear all carried upon the sub-frame and forming aunitary structure therewith.

6. In a printing press, a machine frame, means for effecting theprinting and means for. feeding the material to be printed thereto, "a'gear-box,"

detachably mounted on said frame, and driving gear for said means.contained withinthegear box.

' A fiat-bed printing press comprising a suppqijtingframe, a-printing"carriage reciprocata-ble the'reonfan impression cylinder for'cooperating -'with 'saidcarriage, feed "mechanism I fordeliveringthe-material to "be printed tosa'id pr ss; a sub-framefdetachably mounted within the saidfsupporting frame and drivingmechan'is'm for said carriage, cylinder and feed'mechanism carriedby-said' sub-frame and removable as aunit therew-ith,

"'BlfA flat bed printing'press comprising a supporting frame, a printingcarriage reciprocatable thereonan impression cylinder for co-operatingwith said carriage," feedmechanism for deliveringr'naterial to beprinted to said press, a subfraine detachablymou'nted within saidsupportssl ing frame, and a driving motor for imparting motion to thesaid carriage, cylinder and feed mechanism carried by said sub-frame andforming a unitary structure therewith.

9. A flat-bed printing press comprising a supporting frame, a printingcarriage reciprocatable thereon, an impression cylinder, feed mechanism*for delivering thematerial to be printed td said press, asubi-framedetachably mounted in said supporting frame, driving mechanismfor the said carriage, cylinder'and feed mechanism "carried by saidsub-frame and removable as a unit therewith and detachable couplingsextending "from said driving mechanism to the said-carrlage, 5cylinderand feed mechanism for imparting, motion thereto.

E'IOFAflat-bed printing press comprising a sup porting frame, a printingcarriage recipr0- i-catableiithereon, an impression cylinder, feedmechanism for delivering the material to be printedto said-press, a subframe detachably mounted in -'said supporting 'frame; driving mechanismfor "the Said carriage, cylinder and feed mechanism carried by-saidsub-frame and rmd'va'bleas a unit therewith and toothed wheels fortransmitting the drive from said driving mechanism" to "said carriage,cylinder and -feedmechanism for imparting motion thereto. y

III-A printingpres's comprising an impression member and a printingmember, means for feeding the "material to be' printed between them,-"aframe'for said-press, a gear-box removably attachecl' to said frame anddriving gear for the press housed Within said gear box.

' WALTER ROCKSTROH.

